231 citations · 1.5k across the 47 of their papers we have counts for
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A New Noncommutative Product on the Fuzzy Two-Sphere Corresponding to the Unitary Representation of SU(2) and the Seiberg-Witten Map
K. Hayasaka, R. Nakayama, Y. Takaya
We obtain a new explicit expression for the noncommutative (star) product on the fuzzy two-sphere which yields a unitary representation. This is done by constructing a star product…
An Associative and Noncommutative Product for the Low Energy Effective Theory of a D-Brane in Curved Backgrounds and Bi-Local Fields
Kiyoshi Hayasaka, Ryuichi Nakayama
We point out that when a D-brane is placed in an NS-NS B field background with non-vanishing field strength (H=dB) along the D-brane worldvolume, the coordinate of one end of the o…
Conformal Invariance of the D-Particle Effective Action
Kiyoshi Hayasaka, Ryuichi Nakayama
It is shown that the effective theory of D-particles has conformal symmetry with field-dependent parameters. This is a consequence of the supersymmetry. The string coupling constan…
Non-critical open strings beyond the semi-classical approximation
J. Ambjorn, K. Hayasaka, R. Nakayama
We studied the lowest order quantum corrections to the macroscopic wave functions of non-critical string theory using the semi-classical expansion of Liouville theory.…